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\bibitem{Caignaert_etal2009} {\textquotedblleft}\textit{A new mixed-valence ferrite with a cubic structure, YBaFe$_{4}$O$_{7}$: spin-glass-like behavior}{\textquotedblright}. Caignaert V, Abakumov AM, Pelloquin D, Pralong V, Maignan A, Van Tendeloo G, Raveau B, Chemistry of materials \textbf{21}, 1116 (2009).   http://doi.org/10.1021/cm803312f

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